This variable is the date when the beneficiary first became eligible for Medicare coverage (Part A or Part B).
Comments
Historic date of 1st Medicare coverage (may be prior to 1999, which is the earliest claim files available through CCW)
Source: CMS Common Medicare Environment (CME)
Historic date of 1st Medicare coverage (may be prior to 1999, which is the earliest claim files available through CCW)
Source: CMS Common Medicare Environment (CME)